Padmounted distribution transformer tank

Abstract

A padmounted distribution transformer tank is disclosed wherein hem-bend flanges are constructed upper edge of the front terminal panel to act as a heat shield to protect the painted surface during the welding operation on the cover. Hem-bend flanges are also utilized on the sidewalls of the tank to improve the structural strength of the tank flange.

What is claimed is: 
     
       1. In a padmounted distribution transformer including a top-loaded tank having terminals on an outer surface of a recessed terminal wall, the improvement wherein the terminal wall of said tank has a hem-bend forming a flange extending along the top edge of said wall, said hem-bend comprising two layers of wall material folded together and extending perpendicular to the terminal wall, an upper layer of said hem-bend having a width greater than a lower layer and extending to an opposite side of said terminal wall from said hem-bend, and a tank cover welded to the upper layer of said hem-bend wherein said lower layer of said hem-bend provides a heat-sink a welded joint between said tank cover and said upper layer joint. 
     
     
       2. In a padmounted distribution transformer, the improvement according to claim 1 wherein said hem-bend projects into an interior of said tank and said upper layer of said hem-bend extends outside of the transformer, tank beyond the outer surface of said terminal wall. 
     
     
       3. In a padmounted distribution transformer, the improvement according to claim 1 wherein said hem-bend extends outside of the tank beyond the outer surface of said terminal wall and said upper layer of said hem-bend extends inside of said tank. 
     
     
       4. In a padmounted distribution transformer, the improvement according to claim 1 wherein said top-loaded tank includes a pair of sidewalls, connected to said terminal wall, at least one of said sidewalls including a hem-bend forming a flange extending along an edge thereof adjacent said terminal wall, said hem-bend on said at least sidewalls one of said comprising two layers of wall material folded together with an edge of one of said layers engaging the outer surface of said terminal wall wherein said hem-bends increase the structural strength of the tank. 
     
     
       5. In a padmounted distribution transformer, the improvement according to claim 4 wherein both of said sidewalls of said tank include a hem-bend having an edge engaging the outer surface of said terminal wall.